PHILADELPHIA — A commercial flight carrying U.S. Sen. Patrick Leahy and 79 others to Vermont diverted to Philadelphia on Friday because of mechanical problems, authorities said. No injuries were reported.

Leahy, third in line to the presidency, told The Associated Press that the US Airways flight landed smoothly and passengers were being transferred to another flight to Burlington.

The pilot reported hydraulic problems soon after leaving Washington’s Reagan National Airport at about 10:15 a.m., prompting him to divert to Philadelphia at about 11:30 a.m., officials said.

Leahy said he’d known the pilot, Drew Chace of Vermont, for years, and said he did “a remarkably good job.”

The Federal Aviation Administration was investigating.

Leahy, who has represented Vermont in the Senate since 1975, said he and his wife, Marcelle, fly between Burlington and Washington several times a month and had never had a serious problem. He said he’s had more hair-raising experiences flying overseas but would still be especially glad to see his Middlesex home.

Leahy, president pro tem of the senate, had a security team traveling with him.

On Wednesday, a Republic plane had to return to New Jersey’s Newark Liberty International Airport soon after departing for Raleigh after the flight crew smelled smoke in the cockpit. No one was injured.

Republic spokesman Peter Kowalchuk said there is no link between the two incidents, noting that different aircrafts and different mechanical problems were involved.